CN114191735A

CN114191735A - Climbing anti-falling safety protection device

Info

Publication number: CN114191735A
Application number: CN202010988048.3A
Authority: CN
Inventors: 林锦桐
Original assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-18
Anticipated expiration: 2040-09-18
Also published as: CN114191735B

Abstract

The invention relates to the field of high-altitude anti-falling tools, in particular to a climbing anti-falling safety protection device. The safety device is used for ascending operation areas of transformer substation frameworks, power transmission towers and the like, and comprises a straight sliding groove, a transmission wheel, a connecting shaft and a braking mechanism, wherein the braking mechanism comprises a wheel body and at least two brake shoes, the brake shoes are distributed around the circumferential direction of the wheel body, tension springs are connected and stretched between the end parts of every two brake shoes, and the whole safety device is of an annular structure. The transmission wheel rolls along the rolling path of the straight sliding groove to drive the wheel body to rotate synchronously, the ejector block moves away from the center of the circle of the wheel body under the action of centrifugal force to eject each brake shoe and enable every two brake shoes to be unfolded, the annular outer diameter of each brake shoe is increased, and therefore the outer wall of each brake shoe is abutted to the side wall of the straight sliding groove to brake. The invention can continuously protect climbing operators, and when falling occurs, the climbing operators rotate at high speed to generate friction braking in time, thereby ensuring the personal safety of the falling operators and preventing accidents.

Description

Climbing anti-falling safety protection device

Technical Field

The invention relates to the field of high-altitude anti-falling tools, in particular to a climbing anti-falling safety protection device.

Background

The framework of the outdoor open-type transformer substation is an important component in the substation and can be divided into a wire inlet frame, a bus frame, a central door-shaped frame, a corner frame, a transformer combined frame and the like, and the height of the framework can reach dozens of meters or even nearly 30 meters according to the design requirements of different transformer substations. Usually, the operation personnel need the operation of ascending a height, generally, on the operation personnel went up to tens of meters even hectometer high altitude through the cat ladder on the climbing framework, the operation personnel need use one step of knot of safety belt to protect at the climbing in-process, and is comparatively loaded down with trivial details. However, if the safety belt is not used for protection, personal casualty accidents are easily caused, and the falling accidents are caused by the fact that the safety belt is not tied in the process of climbing the framework and the iron tower every year.

Chinese patent publication No. CN102815650A discloses a fall-preventing device in 12/2012, which utilizes the rotating centrifugal force of a rotating wheel to brake in time, but the fall-preventing device is mainly used in cooperation with a lifting platform, and has complex components and certain maintenance difficulty.

Disclosure of Invention

The invention provides a climbing anti-falling safety protection device for overcoming the risk of the conventional climbing operation, which is applied to climbing anti-falling of an operator without additional manual operation, and once the operator suddenly loses weight and falls during climbing, the falling operator can fall at a constant speed by using the action of a rotating centrifugal force, so that the personal safety of the falling operator is ensured, and accidents are prevented.

In order to solve the technical problems, the invention adopts the technical scheme that:

a climbing anti-falling safety protection device comprises a straight chute, a driving wheel, a connecting shaft and a braking mechanism, wherein the braking mechanism is arranged in a manner of being attached to the driving wheel, and the connecting shaft simultaneously penetrates through the centers of the driving wheel and the braking mechanism;

the brake mechanism comprises a wheel body and at least two brake shoes, the wheel body is movably provided with a plurality of ejector blocks, and the ejector blocks are uniformly distributed around the circumference of the wheel body and can move back and forth to penetrate through the maximum outer diameter of the wheel body; the brake shoes are distributed around the circumference direction of the wheel body and are integrally in an annular structure; tension springs are connected between the end parts of every two brake shoes, two ends of each tension spring are respectively clamped at the end parts of the two brake shoes, and the tension springs are always kept in a stretching state; the centers of the circle of the driving wheel and the circle of the wheel body are positioned on the same axis, and the driving wheel is clamped and fixed with the wheel body and synchronously rotates around the connecting shaft; a guide rail is protruded on the inner side of the straight chute, and the driving wheel rolls along the guide rail; the distance between one side of the guide rail and the opposite side of the guide rail is smaller than the maximum annular outer diameter of the brake shoe and larger than the minimum annular outer diameter of the brake shoe.

The transmission wheel rolls along the rolling path of the straight sliding groove to drive the wheel body to rotate synchronously, the ejector block moves away from the center of the circle of the wheel body under the action of centrifugal force to eject each brake shoe and enable every two brake shoes to be unfolded, the annular outer diameter of each brake shoe is increased, and therefore the outer wall of each brake shoe is abutted to the side wall of the straight sliding groove to brake.

The safety device is used for ascending operation areas such as transformer substation frameworks and transmission towers, wherein the straight sliding grooves are vertically arranged, the straight sliding grooves are opened at specific positions at two end parts, and parts such as a driving wheel and a braking mechanism are installed in the straight sliding grooves at the beginning. In addition, a straight sliding groove which is continuously connected in the transverse direction and the longitudinal direction can be arranged, and the safety device is connected with the safety belt of an operator all the time to achieve the protection effect without frequent assembly and disassembly. Generally, the end of the connecting shaft is connected and fixed to the operator harness.

Under the general state, the annular outer diameter of the brake shoe is smaller than the distance between the inner walls of the opposite sides of the straight sliding groove, and the brake shoe does not have resistance influence during low-speed rotation. When the wheel body suddenly falls, the rotating acceleration is increased, and the ejector block on the wheel body is acted by centrifugal force to move away from the center of the wheel body, so that the brake shoes are ejected to be propped open, the annular outer diameter of each brake shoe is increased, and friction force is generated between the annular outer diameter of each brake shoe and the side wall of the straight sliding groove to brake and decelerate.

Furthermore, the driving wheel is a gear, the guide rail is a spur rack, and the spur rack is used as a rolling path of the driving wheel. The transmission wheel rolls back and forth along the straight gear without additional operation.

Furthermore, the two sides of the driving wheel are respectively jointed and clamped with a braking mechanism, one side of the braking mechanism far away from the driving wheel is covered with an outer cover, and the two outer covers are locked and tightly clamp the brake shoes. The driving wheel is clamped between the braking mechanisms at the two sides, so that the stress balance of the two sides is ensured during high-speed rotation braking. The outer cover covers the wheel body and the two side surfaces of the brake shoe, and radial movement of the ejector block and the brake shoe is not influenced.

Furthermore, the end part of the brake shoe is provided with a tension spring hole for accommodating a tension spring, and the inner diameter of the tension spring hole is larger than the maximum outer diameter of the tension spring. The tension spring holes at the ends of the two cooperating brake shoes are centrally aligned for placement of the tension springs.

Furthermore, the brake shoes are arc-shaped, and the end parts of the two brake shoes which are connected with each other are embedded. The outer side of the end part of the brake shoe extends along the arc direction to form a matching block, and the inner side of the end part is contracted along the arc direction to form a matching groove; the outer side of the end part of the brake shoe which is matched and connected with the brake shoe is provided with a matching groove along the arc direction in a shrinking mode, and the inner side of the end part is provided with a matching block along the arc direction in an extending mode; the matching block is matched with the matching groove in size. Under the action of the tension spring, the matching blocks of the two brake shoes are mutually embedded with the matching grooves. The brake shoes matched in the form have small mutual friction resistance, and the brake shoes are convenient to reset and expand only by overcoming the tension of the tension spring.

Furthermore, the ejector blocks are symmetrically distributed, and the included angles between every two ejector blocks are equal. The jacking blocks are uniformly distributed and radially ejected to the inner wall of the brake shoe under the action of centrifugal force, so that the brake shoe is pushed to be spread.

Furthermore, the wheel body is provided with a fixed shaft for movably limiting the ejector block, the ejector block is correspondingly provided with a groove position, and the fixed shaft is clamped in the groove position; the wheel body is provided with an installation position for placing the ejector block, and the installation position is matched with the ejector block in shape. The fixed shaft is parallel to the axial direction of the wheel body and is arranged close to the circumferential edge of the wheel body. The opening of the mounting position faces the inner wall of the brake shoe.

Furthermore, the kicking block is the runner, the trench is located the runner center, and the trench radius is greater than the fixed axle external diameter. The rotating wheel is assembled on the wheel body through the groove position and the fixed shaft, and the inner diameter of the groove position is larger than the outer diameter of the fixed shaft, so that sufficient moving space of the rotating wheel is ensured.

Furthermore, the circumferential outer wall of the brake shoe is provided with a friction plate. The friction plate is a commonly used part of the existing brake and is mainly used for enhancing the braking effect and the wear resistance of the brake shoe.

Further, a connecting ring is arranged at the end part of the connecting shaft. When the operation, the operation personnel only need with hasp and go-between lock joint on the safety belt, alright scramble the operation, drive the drive wheel at this process and roll upwards along straight spout, need not like traditional safety belt "one step of detain", effectively improve and scramble efficiency.

Compared with the prior art, the invention has the beneficial effects that: the invention discloses a climbing anti-falling safety protection device, which can continuously protect climbing operators, and when falling occurs, the climbing operators rotate at a high speed to generate friction braking in time, so that the personal safety of the falling operators is ensured, and accidents are prevented. Moreover, the safety device can run along the transverse and longitudinal straight chutes in high altitude, is continuously protected, does not need to replace a safety belt, is convenient to use, is safe and reliable, and effectively improves the working efficiency. The friction resistance between the matching forms of the brake shoes is small, the brake can be unfolded by overcoming the tension of the tension spring, and the resetting is convenient.

Drawings

FIG. 1 is a plan view of embodiment 1.

FIG. 2 is a state diagram of the use of embodiment 1.

FIG. 3 is a schematic structural view of embodiment 1.

Fig. 4 is an exploded view of the assembly of example 1.

FIG. 5 is a schematic view of the structure of the brake mechanism of embodiment 1.

Fig. 6 is an assembled exploded view of the braking end of the braking mechanism of embodiment 1.

Fig. 7 is a structure view of a brake shoe of the brake mechanism of embodiment 1.

FIG. 8 is an internal structural view of embodiment 1.

Fig. 9 is a schematic assembly view of a brake shoe according to embodiment 2.

The brake device comprises a straight sliding groove 1, a guide rail 11, a driving wheel 2, a connecting shaft 3, a connecting ring 31, a brake mechanism 4, a wheel body 41, a mounting position 411, a fixing shaft 412, a brake shoe 42, a matching block 421, a matching groove 422, an outer cover 43, a friction plate 44, a tension spring 45, a tension spring hole 451, a clamping block 452, a jacking block 46 and a groove 461.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1

As shown in fig. 1-4, the present embodiment provides a climbing anti-falling safety protection device, which includes a straight chute 1, a transmission wheel 2, a connecting shaft 3, a braking mechanism 4 and an outer cover 43, wherein the transmission wheel 2 is a gear, the straight chute 1 is a rectangular channel, a guide rail 11 in rolling fit with the transmission wheel 2 is disposed inside the straight chute 1, and the guide rail 11 is a spur rack in the present embodiment, and the spur rack is a rolling path. Specifically, for convenience of description, the side wall where the spur rack is located is the right side of the straight chute 1, the left side of the straight chute 1 is smooth, and the other two sides are the front side and the rear side. The front side of the straight chute 1 is hollowed with a separation groove so that the connecting shaft 3 extends out, and meanwhile, a baffle plate for intercepting components of the driving wheel 2 and the braking mechanism 4 in the straight chute 1 is reserved, and the rear side of the straight chute 1 is closed in the embodiment.

The driving wheel 2 is clamped between the braking mechanisms 4 at the two sides and is fixedly connected with the braking mechanisms 4 in a clamping way. Furthermore, the connecting shaft 3 penetrates through the centers of the driving wheel 2 and the braking mechanism 4, the end part of the connecting shaft 3 is provided with a connecting ring 31, and the connecting ring 31 is in the same direction with the front side of the straight chute 1 and is positioned outside the separating chute.

Specifically, as shown in fig. 5, the brake mechanism 4 includes a wheel body 41 and two brake shoes 42, wherein the two brake shoes 42 are semicircular, the two brake shoes 42 are disposed around the wheel body 41 in the circumferential direction to form an annular structure, a tension spring 45 is connected between the end portions of every two brake shoes 42, two ends of the tension spring 45 are respectively clamped to the end portions of the two brake shoes 42, and the tension spring 45 is always kept in a tension state. Meanwhile, the circumferential outer wall of the brake shoe 42 is provided with a friction plate 44. In an initial assembly state, the driving wheel 2 is meshed with the guide rail 11, and a gap is reserved between the brake shoe 42 and the left side and the right side, namely, the distance between one side of the guide rail 11 of the straight chute 1 and the opposite side is smaller than the maximum annular outer diameter of the brake shoe 42 and larger than the minimum annular outer diameter of the brake shoe 42, so that the straight chute can roll without resistance in a general state and can brake in time when falling.

Specifically, the centers of circles of the driving wheel 2 and the wheel body 41 are located on the same axis, the driving wheel 2 and the wheel body 41 are clamped and fixed, and the driving wheel 2 and the wheel body rotate synchronously around the connecting shaft 3. Meanwhile, the side of the brake mechanism 4 away from the transmission wheel 2 is covered with the outer cover 43, the outer covers 43 lock and clamp the brake shoes 42, and the connecting shaft 3 also penetrates through the centers of the outer covers 43 at the same time, as shown in fig. 4.

Specifically, as shown in fig. 6 to 7, the end of the brake shoe 42 is provided with a tension spring hole 45 for accommodating a tension spring 45, the tension spring hole 45 is located at the center of the end, the inner diameter of the tension spring hole 45 is larger than the maximum outer diameter of the tension spring 45, and a latch 452 for latching the end of the tension spring 45 is further arranged in the tension spring hole 45.

In addition, on two interconnected brake shoes 42, the outer side of the end of one brake shoe 42 extends along the circular arc direction to form a matching block 421, the inner side of the end is provided with a matching groove 422 along the circular arc direction, the outer side of the end of the brake shoe 42 matched and connected with the end is provided with a matching groove 422 along the circular arc direction, the inner side of the end is provided with a matching block 421 along the circular arc direction, and the matching block 421 is matched with the matching groove 422 in size. The ends of the two brake shoes 42 are fitted to each other by the tensile force of the tension spring 45 via the fitting block 421 and the fitting groove 422. The brake shoes 42 matched in the form have small mutual friction resistance, and the brake shoes are convenient to reset and expand only by overcoming the tension of the tension springs 45.

In this embodiment, as shown in fig. 8, six ejector blocks 46 are movably disposed on the wheel body 41, each ejector block 46 is uniformly and symmetrically distributed around the circumference of the wheel body 41, and the included angles between every two ejector blocks 46 are equal. Specifically, the wheel body 41 is provided with a mounting position 411 for placing the top block 46, and the mounting position 411 is matched with the shape of the top block 46. Each mounting position 411 of the wheel body 41 is provided with a fixing shaft 412 for limiting the movement of the ejector block 46, and the fixing shaft 412 is parallel to the axial direction of the wheel body 41 and is arranged close to the circumferential position of the wheel body 41. In this embodiment the top block 46 is a wheel and thus the mounting locations 411 are semi-circular with a central angle of less than 180 degrees.

In the embodiment, under the condition of accelerated rotation, the jacking block 46 is gradually jacked out to promote the brake shoes 42 to be mutually propped open for braking, and then automatically retracted and reset under elasticity, so that braking or deceleration can be automatically implemented under emergency, additional manual control is not needed, and the control effect is better.

In addition, as shown in fig. 8, a slot 461 is provided at the center of the wheel, and the wheel is assembled on the wheel body 41 through the slot 461 and the fixed shaft 412. Specifically, the inner diameter of the slot 461 is larger than the outer diameter of the fixed shaft 412, so as to ensure that the rotating wheel has sufficient moving space, and the rotating wheel moves back and forth in the moving space defined by the slot 461, so that the rotating wheel passes through the maximum outer diameter range of the wheel body 41 under the action of centrifugal force.

The braking mechanism 4 has the following specific braking process: when the rotational acceleration of the wheel 41 reaches a certain value, the centrifugal force generated also reaches the trigger point of the braking device. At this time, the ejector 46, i.e., the runner, of the wheel body 41 moves away from the center of the wheel body 41 due to the centrifugal force, and the ejector 46 pushes each brake shoe 42 and spreads the brake shoes 42 in pairs, thereby increasing the annular outer diameter of the brake shoes 42 and performing deceleration and braking. When the brake shoe 42 is spread, the tension spring 45 is pulled open, and the engagement piece 421 and the engagement groove 422 at the end of the brake shoe 42 are separated. When the rotational acceleration of the wheel body 41 is reduced, the centrifugal force of the ejector block 46 is reduced, the end engagement block 421 and the engagement groove 422 are re-engaged and returned with the brake shoe 42 under the pulling force of the tension spring 45, and the brake shoe 42 is completely retracted and returned.

The overall implementation process of the embodiment is as follows:

before climbing, the operator fastens the lock catch on the safety belt with the safety device connecting ring 31 and then climbs. The driving wheel 2 is driven to roll upwards along the straight chute 1 in the climbing process without additional operation. When an operator suddenly falls, the driving wheel 2 rapidly rolls down along the rolling path of the straight chute 1, and the driving wheel 2 drives the braking mechanisms 4 on the two sides to synchronously rotate. When falling, because the rotation acceleration of the transmission wheel 2 and the wheel body 41 is increased, the ejector block 46 on the wheel body 41 moves away from the center of the wheel body 41 under the action of centrifugal force, so that the brake shoes 42 are ejected, the brake shoes 42 are spread, the annular outer diameter of the brake shoes 42 is increased, and the friction sheets 44 on the outer wall of the brake shoes 42 generate friction force with the side wall of the straight sliding chute 1 to brake and decelerate. Finally, the falling personnel can descend at a constant speed, so that the personal safety of the falling personnel is ensured, and accidents are prevented.

Example 2

The principle and structure of the centrifugal rotating wheel type anti-falling self-locking safety device are similar to those of the embodiment 1, but the difference is that in the embodiment, the number of the brake shoes 42 of the brake mechanism 4 is more than two, each brake shoe 42 is arc-shaped, the end parts of each brake shoe 42 are connected end to end through the tension spring 45 to form an annular structure, and as shown in fig. 9, each brake shoe 42 is pushed by the ejector block 46 and simultaneously expands outwards to perform braking.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a safety device that prevents falling ascends a height which characterized in that: the braking mechanism is arranged in a manner of being attached to the driving wheel, and the connecting shaft simultaneously penetrates through the centers of the driving wheel and the braking mechanism;

the brake mechanism comprises a wheel body and at least two brake shoes, wherein the wheel body is movably provided with a plurality of ejector blocks, and each ejector block is arranged around the circumference of the wheel body and can move back and forth to penetrate through the maximum outer diameter of the wheel body; the brake shoes are distributed around the circumference direction of the wheel body and are integrally in an annular structure; tension springs are connected between the end parts of every two brake shoes, two ends of each tension spring are respectively clamped at the end parts of the two brake shoes, and the tension springs are always kept in a stretching state;

the centers of the circle of the driving wheel and the circle of the wheel body are positioned on the same axis, and the driving wheel is clamped and fixed with the wheel body and synchronously rotates around the connecting shaft;

a guide rail is protruded on the inner side of the straight chute, and the driving wheel rolls along the guide rail; the distance between one side of the guide rail and the opposite side of the guide rail is smaller than the maximum annular outer diameter of the brake shoe and larger than the minimum annular outer diameter of the brake shoe;

2. The device of claim 1, wherein: the transmission wheel is a gear, the guide rail is a spur rack, and the spur rack is used as a rolling path of the transmission wheel.

3. The device of claim 2, wherein: the brake mechanism is jointed and clamped on two sides of the driving wheel, one side of the brake mechanism, which is far away from the driving wheel, is covered with an outer cover, and the two outer covers are locked and tightly clamp the brake shoes.

4. A climbing fall arrest safety shield according to claim 3 in which: the end part of the brake shoe is provided with a tension spring hole for accommodating a tension spring, and the inner diameter of the tension spring hole is larger than the maximum outer diameter of the tension spring.

5. The device of claim 4, wherein: the brake shoes are arc-shaped, and the end parts of the two brake shoes which are connected with each other are embedded.

6. The device of claim 5, wherein: the ejector blocks are symmetrically distributed, and included angles between every two ejector blocks are equal.

7. The device of claim 6, wherein: the wheel body is provided with a fixed shaft for movably limiting the ejecting block, the ejecting block is correspondingly provided with a groove position, and the fixed shaft is clamped in the groove position; the wheel body is provided with an installation position for placing the ejector block, and the installation position is matched with the ejector block in shape.

8. The device of claim 7, wherein: the kicking block is the runner, the trench is located the runner center, and the trench radius is greater than the fixed axle external diameter.

9. A climbing fall arrest safety shield according to any one of claims 1 to 8 in which: and friction plates are arranged on the circumferential outer wall of the brake shoe.

10. The device of claim 9, wherein: and a connecting ring is arranged at the end part of the connecting shaft.